fletcher



T. PLETGHER.

GAS BURNER FOR HEATING PURPOSES. No. 291,475. I Patented Jan. 1, 1884.

(No Model.)

Witnesses. 3 Inventor.

. Jil'rna; V fur/mg! y,

UNrr-En STATES PATENT Grinch.

THoMAs rnnronnn, or wAnRINeroN, ooUNrv or LANCASTER, EN LAND.

GAS-BURNERS FOR HEATING PURPOSES.

SPECIFICATION forming part of Letters Patent No. 291,475, dated January 1, 1884.

Application filed Jufy 11, 1883. (N model.) Patented in England April 28, 1882, No. 2,019, and in Canada December 7, 1882, No. 15,919.

To all whom it may concern.-

Be it known that I, TnoMAs FLETCHER, a subject of the Queen of Great Britain, residing in Warrington, in the county of Lancaster and Kingdom of Great Britain, have invented certain new and useful Improvements in Gas-Burners for Heating Purposes, of which the following is aspecification.

This invention relates to gas-burners for heating purposes, and has for its object the production of a large flame-surface in a comparatively small area without the use of metallic gauze, and without any danger of the flame lighting back through the body of the burner to the gas-jet.

The invention also relates to certain details of construction, all of which will be fully and clearly hereinafter shown and described by reference to the accompanying drawings,

in which Figure 1 is a plan or top view; Fig. 2, a side elevation, and Fig. 3 represents a vertical longitudinal section through line X X, Fig. l.

The burner a is made of cast-iron, and formed of one piece, consisting of the following-named parts: first, the inlet-tube u, having the air-opening a second, the center burner, c provided with a series of narrow parallel slits, a; third, the circular or annular burner a surrounding the burner a and provided with a series of radially-arranged narrow slits b.

B represents the gas-burner or nozzle. It is made to screw into the burner a, so that the opening 21* will be in a line with the top of the opening a, or a little above it. The burner a is secured to a frame, I), by means of the screws 12*. vThis supporting-frame I) is also made of cast-iron or other suitable material, cast in one piece, and consists of the legs If b, supporting rim 0, part 0, having the leg I)", and upper-vertical supports, 0 for holding or supporting the articles to be heated or for other purposes. The maximum width of the slits a and I) should not exceed one-fif eenth of an inch, and they must be formed by cutting or some equivalent process, so as to insure an approximate parallelism of the two faces of the slits. If they are all east through or nearly through the body of the burner and then opened, as is frequently the practice, the result is not' satisfactory, as when the mixture of gas and air supplied to the burner is highly explosive the flame is very liable to fly back to the internal part of the burner.

The width of slit which I find most satisfactory is one-thirtieth of an inch, and any departure tube farthest from the burner, and is provided with the gas jet or burner B, which may be of the usual or any special form of construction. In gas-burners made according to these improvements atmospheric air is combined with the gas in due proportion in the supply-tube, the proportions being regulated by the size of the gas-inlet. From the supply tube a, the mixture of gas and air passes through the slits over which combustion takes place. The employment of these slits, instead of holes or slots hitherto employed, compels the combined. gas and air to issue from the burner in a series of parallel or approximately parallel thin films. By this mixture the air has free and immediate access to a greater surface of the inflammable mixture at the point of emergence, and the result is a flame possessing a more intense heating power. Moreover, I and enabled thereby to obtain a powerful burner of small dimensions.

I claim 1. A gas-burner for heating purposes, con sisting of the inlet or supply tube a, having an air-opening, a and gas-jet B, and a center burner, a9, arranged within an annular burner, a, each being provided with a senular burner, a surrounding the burner a ries of narrow out openings or slits, a and 11, substantially as described.

the Whole mounted upon a suitable support- THOS. FLETCHER. ing-frame, substantially as specified.

2. A gas-heating burner consisting of the following parts, all cast or formed of one piece: the inlet or supply tube a, provided With the air-opening a, gas-jet B, and an an- \Vitnesses:

JAMES ARTHUR J AOKSON,

41 Wilson Patten S12, lVawington. JAMES SANDERS, 144 Church Place, Warrington. 

